Interdental brush



FIG. 1 is a perspective view of my design;

FIG. 2 is a front end view of the design of FIG. 1;

FIG. 3 is a rear end view of the design of FIG. 1;

FIG. 4 is a side view of the design of FIG. 1;

FIG. 5 is a side view of the design of FIG. 1, rotated 90 degrees relative to the side view of FIG. 4;

FIG. 6 is a side view of the design of FIG. 1, rotated 90 degrees relative to the side view of FIG. 5; and,

FIG. 7 is a side view of the design of FIG. 1, rotated 90 degrees relative to the side view of FIG. 6. 

CLAIM The ornamental design for a interdental brush, as shown and described. 